Calculated energy deposits from the decay of tritium and other radioisotopes incorporated into bacteria.
Transmutation of the radioisotope tritium occurs with the production of a low energy electron, having a range in biological material similar to the dimensions of a bacterium. A computer program was written to determine the radiation dose distributions which may be expected within a bacterium as a result of tritium decay, when the isotope has been incorporated into specific regions of the bacterium. A nonspherical model bacterium was used, represented by a cylinder with hemispherical ends. The energy distributions resulting from a wide variety of simulated labeled regions were determined; the results suggested that the nuclear region of a bacterium receives on the average significantly different per decay doses, if the labeled regions were those conceivably produced by the incorporation of thymidine-(3)H, uracil-(3)H, or (3)H-amino acids. Energy distributions in the model bacterium were also calculated for the decay of incorporated (14)carbon, (35)sulfur, and (32)phosphorous.
D000596:Amino Acids / Q000378:metabolism; D001419:Bacteria / Q000378:metabolism / Q000528:radiation effects*; D002247:Carbon Isotopes; D003201:Computers; D008954:Models, Biological; D010759:Phosphorus Isotopes; D013460:Sulfur Isotopes; D013936:Thymidine / Q000378:metabolism; D014316:Tritium; D014498:Uracil / Q000378:metabolism
D000596:Amino Acids; D002247:Carbon Isotopes; D010759:Phosphorus Isotopes; D013460:Sulfur Isotopes; D014316:Tritium; D014498:Uracil; D013936:Thymidine